G3telecom - Great choices- G3 Prepaid auto plan and G3 prepaid plan; OnLine Account Statement with call details, great way to monitor and budget your calls. Service available from anywhere in Canada.

Raza.Ca - Quality India phone cards and calling cards online, cheap rates. Prepaid cards with a wide variety - Direct Connect features view account detail online, premium connections and much more. Also available monthly Pak, Prepaid Gift Cards.

Just Dial - Prepaid Long Distance Calling Cards  India (Long Distance Rate/Plan). Benefits include - Use when traveling - worldwide PIN # provided, Rechargeable by phone or online.

Geo Tel Provides the lowest Long Distance rate to anywhere in the world. Clear connections, Use from Home, Office or Cell phone.Canada 3¢/Min, India 12.5¢/Min.

RaniDirect - Value services for South Asians around the world through the use of Ip Phones, VoIP, Calling Cards, and Direct Dialed Long Distance Services.

Reliance India Call - Gel low rates by keeping your existing long distance service provider.

Reliablecom.com

450tel.ca - Canada & USA . 4 ¢/min. after the first 20 minutes. 450TeL is committed to offering a high-quality low-cost product. 450TeL is only available from landlines in Ontario.

Airtel STD/ISD Calling Card. Bharti-Airtel offers VCC - Virtual Calling Card and the rates can be as low as Rs3.50/Minute to US/Canada/Malaysia/Hong Kong/Singapore Mobile & Land Phone.

CallingCards.com - Home of Online Calling Cards (As low as 15.2 ¢/min)

CallNation.com- calling plans include India, Bangalore 7¢!!

Cytus.com - One of the largest (and oldest) providers of long distance service to call from the U.S. to India.

DigitalTone.net – Cheap Calling Cards - Cheap Calling Cards Call anywhere in India for 7.9 ¢ per minute, Pakistan for 6.8 ¢ per minute and best rates for all over the world. No monthly Fee, No need to switch your current service. Can be used from any phone (home, work or cell).

DialxChange.com - Calling plans from various carriers and telecom resellers are available

Callrewards - Make unlimited free phonecalls to any regular phone in the U.S. from your PC.

Cheap Long Distance - Use the calculator at www.USATalkCheap.com to compare and find the cheapest long distance carriers in your area.

DeltaThree- Free PC-to-Phone calls from the US to Canada anytime.

Dialpad- Make unlimited free long-distance calls to anyone in the US at Dialpad.

MediaRing- FREE CALLS TO NORTH AMERICA AND CHINA...Call anyone in the US, Canada, and China for FREE!

Net Caller - Unlimited Internet Long Distance

Net2 Phone- Call from your PC to any Phone in the world for incredibly low rates.

Free World Dialup  - Calls are free to the US and UK, and really cheap worldwide. The only disadvantage is that you can only talk to others with VoIP connection; also you may need to invest in a PC and headset.   

Net2Phone  - Ring any phone in the world with a pre-paid calling card. Long distance costs as little as a penny per minute.
Skype - Peer to Peer (P2P) calls are free, but you can only connect with other Skype-heads.

SipPhone - Free calls to anywhere once you buy the $80 handset. But you can only call other IP phone fans.

Vonage.Ca - You can reach any conventional phone in the world using your existing handset (free adapter required). 

International calling codes - Howtocallabroad.com provides dialing codes and instructions, time zones and phone books for all countries.